LIGHTPROOF Synonyms: 23 Similar and Opposite Words

lightproof

adjective

Definition of lightproof

as in waterproof

Related Words

Relevance

Dissimilar Words

Example Sentences

Recent Examples of Synonyms for lightproof

Adjective

This is not a concern with The North Face option, which is completely waterproof, with sturdy zippers and an extra shell to prevent any leaks.

— Jacqueline Tempera, PEOPLE, 19 Aug. 2026
Featured in the streetwear brand’s fall ’26 preview is the Supreme x Timberland Diamond Plate 6-Inch premium waterproof boot in familiar wheat and black styles.

— Riley Jones, Footwear News, 18 Aug. 2026

Definition of waterproof

Adjective

Cars are becoming more soundproof Today’s drivers aren’t hearing sirens, law enforcement agencies contend, because modern vehicles are adept at noise-blocking.

— Andrew J. Campa, Los Angeles Times, 10 Aug. 2026
That means kicking off with the sacred mountain where shamans perform mudang rituals, the spiritual tradition at the heart of the storyline, and then using that inspiration to step into the soundproof studio to put your vocal chops to the test.

— Rachel Chang, Travel + Leisure, 6 Aug. 2026

Definition of soundproof

Adjective

For now, access appears limited to the steadily expanding group of organizations granted access to Claude Mythos Preview through Anthropic’s — not entirely watertight — private Project Glasswing initiative.

— Robert Hart, The Verge, 9 June 2026
Tunnels are also not truly watertight, requiring drainage measures like sump pumps and creating maintenance and reliability issues, the group advised.

— Skyler Swisher, The Orlando Sentinel, 15 Feb. 2026

Definition of watertight

Adjective

The opening moments of this penultimate episode evoke enough genuine idealism and hope to feel like a rare breath of fresh air, holding the hermetic nastiness of the series in sharp relief.

— Scott Tobias, Vulture, 17 May 2026
The idea was first proposed by Cicero and lived on through the hermetic tradition.

— Literary Hub, Literary Hub, 13 May 2026

Definition of hermetic

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Browse Nearby Words

lightplanes

lightproof

lights

See all Nearby Words

Cite this Entry

Style

“Lightproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lightproof. Accessed 27 Aug. 2026.

Copy Citation

Synonyms of lightproof

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

southpaw

Popular in Grammar & Usage

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

What's the difference between 'fascism' and 'socialism'?

Commonly Misspelled Words

Popular in Wordplay

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

Even More Words That Sound Like Insults But Aren't

Why do we say 'break a leg'?

16 Glee-ridden Words from Schitt's Creek

Popular

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

Games & Quizzes